Heat the Traditional Balsamic Vinegar of Modena P.D.O. in a small saucepan; once the mixture has cooled, add the coarse Sicilian salt.
Spread everything out on a baking tray lined with baking paper and bake for about 40 minutes at 130°C.
Stir occasionally with a wooden spoon. Once the indicated time has elapsed, remove from the oven and allow to cool. Once ready, store the salt in a container and use it as a seasoning.